its quite simple really, take the centre staright away so be a dark trooper so you can jet down there quickly. them focus on taking the rebel box. once it is taken defend it and man a turret cover the centre and you opposite box. once the rebel forces are all coming in from the main entrance got there and kill them all!

[Plague]
[For]
[Today]

I know what you're thinking, I know how you're feeling, Believe me. You're not alone.